Door-operating mechanism



A14 1 2 June 9 7 F'. R; LEMON Y Ab)NOR OPERATING MECHANISM .Filed June18, 1925 5 sheets-unen 1 w? atto: "agi,

m, L tra M Filed June 18, 1925 3 Sheets-Shut 2 HJlIlIIlIIIlllH/[ll atrozuur] Patented Junel 14, 1927.

UNITED STATES PATENT oFFicE.

FRANK R. LEMON, 0F VICKSBURG, MICHIGAN, ASSIGNOR 0F ONE-THIRD TO HENRY l'.B. CRAWFORD ANDVILULU LEMON CRAWFORD.

DOOR-OPERATING MECHANISM.

Application led J'un 18, 1925. Serial N0. 37,977.

This invention relates to improvements inv door operating mechanism. n

The main objects of this invention are:

First, to provide an improved door operating mechanism well adapted forthe opening of sliding doors.

Second, to provide anA improved door operating mechanism for slidingdoors which is comparatively simple in structure and one in which theparts are so arranged that they are not likely to get out of order or'become inoperative in use..

Third, to provide an improved door operating mechanism whichconstitutesa -means for locking the-door inclosed position.

Gbjects pertaining to details and economies of construction andoperation of my invention will definitely appear from the detaileddescription to follow.

I accomplish the objects of my yinvention the devices and meansdescribed in the following specification.` The invention is clearly-dened and pointed out in the claims. A structure embodying the featuresof my invention is clearly illustrated in the accompanying drawingforming a .part of this application, in which:

Fig. I is a fragmentary side elevation of a door operating mechanismembodying the featuresof my invention, certain parts being shown 1nconventional form for convenence in illustration" Fig. II isafragmentary plan view of the parts shown in Fig. I.

Fig. III is a fra mentary rear or reverse view of the parts s own inFig. I, the'track and one of the. door hangers being indicated bydot-.ted lines.

Fig. IV is a detail'view in section on a line corresponding to line 4-4of Figs. II and III, c

Fig. V is a fragmentary view corresponding to that of Fig.- III withcertain parts omitted, the motor control switch being closed.

Fig. VI is a perspective view of the supporting bracket for the motorand certain other` movable parts;-

Fig. VII is a wiring diagram of the electrical control.

Fig. VIII is a fragmentary 'side elevation corresponding to that of Fig.I of a modified form or adaptation of my improvements to a double dooroperating mechanism.

Fig, IX is a fragmentary plan view of the mechanism shown in Fig. VIII.

Fig. X is a fragmentary rear View of the mechanism shown in Fig. VIII. l

Fig. XI is a -detailview partially in section on a line corresponding toline 11-11' of Fig. VIII.

In the drawing the sectional views are taken looking in the direction ofthe little -arrows'at the ends of the section lines and similar numeralsof reference indicate similar parts in all of the views. Referring tothe drawing, 1 represents the door to be operated. Above and parallel tothe plane of travel'ofthe door I mount a supporting beam 2, one of thesupporting brackets for this beam being shown at 3, On

the beam 2 I mount a supporting bracketv 4 for the motor 5, the bracketalso having a bearin 6 for the shaft 7. On one end of this sha is a gear8 meshing with a pinion 9 on the motor shaft l0. On the other end `ofthe shaft is a sprocket Wheel 11. c

The supporting beam 2 also' carries a stub shaft l2 for the sprocketwheel 13, this stub shaft being mounted inl a slot 14 in the` beam foradjustment to tension or tighten thesprocketchain 15 which 'coacts withthe sprockets 11 and 13. The stub shaft 12 has s laterally disposed arms16 with slots 17 engaged by the bolts 18 for adjustably securing thestub shaft to the beam,.the slot 14l permitting this adjustment. Theadjusting screw 19 is secured to the lug 20 'on the stub shaft and ispassed through an ear 21 on the beam, the adjusting nut 22 effecting theadjustment and the stub shaft being secured in its adjusted position.

The sprocket chain carries a pin 23 to which the link or ptman 24 ismounted, the

other end of the link being pivotally connected to the upwardlyprojecting bracket 25 on the door. Thus, when the sprocket 11 is driventhrough the connections described to the motor, the door is opened andclosed.

The motor is vcontrolled by the switch comprising a pair of contacts 26and 27, the contact 27 bein mounted on the arm 28 of a bail-shaped Ieverpivoted at 29 on the bracket 4. -This arm 28 is connected to thearmature 30 on the electromagnet 31 in the circuit of a control switchconventionally .shown at 32.' When the lever is raised by the actuation'ofthe electromagnet 31 it is urges the clutch members together.

engaged and held inswitch closing position by the detent 33 which ispivoted at 34 on the supporting bar 35 secured to the side of the mainsupporting beam 2. y

The spring 36 acts to throw the' detent into engagement with the arm 37of the lever. The arm 37 and the detent 33 are on the same side of thesupporting beam 2 as the sprocket wheels and chain. The switch lever isbail-shaped for convenience in mounting the parts.

The switch lever is urged to its switch opening position by means of thespring 38, :See Fig. I. The detent 33 is released by the trip 39 whichis pivoted on the bar 35, the bar having a plurality of holes 40 thereinso that the pivot 4l for the trip may be adjusted. 'Ihe trip 39 isadjustably connected by the link 42 to-the detent.

The chai-n l5 is provided with trip lugs 43 and 44 adapted toalternately engage the trip releasing the switch lever and allowing theswitch to open, the spring 38 insuring the opening of the switch.

The motor shaft is provided with a brake wheel 45, the brake band 46being passed over this whee?. and one end being connected to the lug 47on the -m'otor bracket 4. The other end of the brake band is connectedto the switch lever at 48st) that when the swtih is opened the brake isapplied to stop the motor and prevent overrunning. The trip lugs 43 and44 are so disposed relative to the connection of the chains to the doorthat the door is stopped with the pin 23 in a central position relativeto the sprocket wheels as shown in Fig. III so that the door is lockedin its closed position to the extent that it is necessary to rotate thedriving sprocket ll, a pull or push on the door being ineffective.

The trip 39 is so disposed that after the switch has been opened themomentum of the door is suiiicient to carry the door to completelyclosed or open position with the pin 23 in a central position relativeto one or the other of the sprockets. Adjusting means for the trip areprovided to secure the desired result.

To prevent damage or breakage in the event that the door should strikean obstacle when partially opened or closed, the gear 8 is connected toits shaft through a friction clutch conventionally shown at 50. Thespring 5l on the projecting end of the slilaft e adjusting nut 52regulates the tension of this spring.

In the modification shown in Figs. .VIII

to XI, I show my improvements adaptedv to a double door operatingmechanism, the doors being indicated at '53. Thismechanism issubstantially that described with the'addition of a gear 54 to the shaft7 and a second gear 55 being provided in mesh with the gear 54 andhaving a shaft 56 on one end of which is a sprocket wheel 57corresponding to the sprocket wheel 1l. A second sprocket chain 58 isprovided and connected to the second door by a second pitman or link 59.i I

' lVith this arrangement the double doors are operated substantially thesam-e as the single door illustrated in Fig. III.

I have not attempted to illustrate or describe certain othermodilications and adaptations which I contemplate as I believe thedisclosure made will enable those skilled in the art to embody or adaptmy improvements as may be desired.

Having thus described my invention what I claim as new and desire tosecure by Let-- ters Patent is: l

l. In an operating mechanism' fo sliding doors, the combination of asupporting beam disposed in a plane parallel to the plane of travel ofthe door to be operated, a motor supporting bracket mounted on said beamand provided with a driven shaft bearing, a driven shaft in said bearingand disposed through the beam, av gear on Said driven shaft having afriction clutch driving connection with the shaft, a motor mounted onsaid bracket and provided with a shaft having a pinion meshing with saidgear, a driving sprocket on said driven shaft, a second sprocket mountedon said beam, a sprocket chain on said sprockets provided with a pair oftrip lugs, a door operating pitman connected to said chain, a motorcontrol means comprising a switch lever mounte on said bracket, a brakedrum on the rxr shaft, a brake band connected at one to said motorsupporting bracket and at the other to said switch lever, a springacting to normally hold said switch lever in switch open position, adetent coacting with said switch lever, a spring urging said detent toengaging position, and a trip. disposed in the path of said trip lugs onsaid chain and connected to said detent.

2. In an operating mechanism for sliding doors, the combination of asupporting beam disposed in a plane parallel to the plane ofv travel ofthedoor to be operated, a motor supporting bracket mounted on said beamand provided with a driven shaft bearing, a driven shaft in said bearingand'disposed through the beam, a gear on said driven shaft, a m'otormounted on said bracket and provided with a shaft having a pinionmeshing with said gear, Ia driving sprocket on said driven shaft, asecond sprocket mounted on said beam, a sprocket chain on said sprocketsprovided with a pair of trip lugs, a door operating pitman connected tosaid chain, a motor control means comprising a switch lever mounted onsaid bracket, a spring acting to normally hold said switch lever inswitch open position, a detent comounted on said driven shaft, asprocket.

chain coacting with said sprockets and provided with trip lugs, a doorconnection on said chain, a motor control means comprising a'switchlever, a brake band coacting with said brake drum and operativelyconnect'ed to said switch lever, a spring acting to normally hold saidswitch lever in switch open position, a detent for holding said switchlever in closed position, a spring nrg ing said detent to engagingposition, an adl justably mounted trip disposed in the path of said triplug on said chain, and a link adjustably connecting said trip'to saiddetent.

4. In a door operatipg mechanism, the combination of a 'motor providedwith a shaft having a pinion, a driven shaft, a gear on said drivenAshaft meshing with said pinion, sprockets, one, of which is mounted onsaid driven shaft, a sprocket chain coacting with said sprockets andprovided with trip lugs, a door connection on said chain, a motorcontrolgmeans comprising a switch lever, a spring acting to normallyhold said switch lever in switch open position, a detent for holdingsaid switch lever in closed position, a spring urging said detent toengaging position, an adjustably mounted trip disposed in the path ofsaid tripv lug on said chain, and a link adjustably connecting'said tripto said detent.

5. In a door operating mechanism, the combination of a motor providedwith a shaft having a pinion and a brake drum, a driven shaft, a gear onsaid driven shaft meshing with said pinion, said gear having a frictionclutch driving connection with the driven shaft, sprockets, one of whichis mounted on said driven shaft, a second adjustably mounted sprocket,a` sprocket chain coacting with said sprockets and provided with triplugs, a door connection on said chain, a motor control switch comprisinga switch lever, an electromagnet operativeassociated with said switchlever, a brake band coacting with said brake drum and operativelyconnected to said switch lever, a detent for holding said switch leverin closed position, and a trip therefor disposed to be actuated by saidtrip lugs.

l6. In a door operating mechanism,- the combination of a motor providedwith a shaft having a pinion, a driven shaft, a gear on said drivenshaftmeshing with said pinion, said gear having a friction clutchdriving connection withl the driven shaft, sprockets, one of which ismounted on said driven shaft, a second -adjustably mounted sprocket, asprocket chain coacting with said sprockets and provided with trip lugs,a` door connection "on said chain, a motor control switch comprising aswitch lever, an electromagnet operatively associated with said switchlever, a detent for holding said switch lever in closed position, and atrip therefor disposed to be actuated by said trip lugs.

7. In a door operating-mechanism, the combination of a motor, a pair ofsprockets, a sprocket chain coacting with said sprockets and providedwith a trip lug, a door connection on said chain, a motor control meanscomprising a switch lever, a spring acting to normally hold said switchlever in switch 'open position, a detent for holding said switch leverin closed position, a spring urging said detent to engaging position, anadjustably mounted trip disposed in the path of said trip lug on saidchain, and a link adjustably connecting said trip to said detent.

8. In a door operating mechanism, the combination of a motor, a pair ofsprockets, a sprocket chain coacting with said sprockets and providedwith a trip lug, a door connection on said chain, a motor con'trol meanscomprising a switch lever, a spring acting to hold said switch lever inswitch open position, a detent for'holding said switch lever in closedposition, a spring ioo urging said detent to` engaging position,

and a trip adjustably assoclated with said detent and lying in the pathof movement of the said trip lug. s

In witness whereof I have hereunto set my hand.

FRANK R. LEMON.

